Series five of Call the Midwife kicks off tonight as we return to Nonnatus House where Easter is approaching in the spring of 1961. It's all go as usual with Patsy helping to deliver a baby that is born with severe deformities, while her husband struggles to cope with his daughter's needs. Elsewhere, Trixie teaches a keep fit class which results in a medical emergency, leaving her determined to teach her patients to understand their own bodies.